Just a newbie here and I am hoping that the security geniuses in here can help me with a problem. I am not a programmer, but our IT person seems to have problems removing malicious codes/scripts in our system.

I work for an online shop which has several programs interfaced with the live site. A month ago, we started having problems with the database. New entries or updates on the database are methodically deleted after an hour or so and even images are being deleted.

My boss tells me that they found about 5 of the malicious codes in several applications and thought that they had cleaned it. When we started working again on the database, the same thing started happening again.

Would appreciate any idea that can help us nip the problem in the bud.